A Staircase Electrode-Wall Configuration for MHD Generators.

Abstract

A staircase electrode-wall configuration for a MHD generator which uses fluid dynamic means to protect the electrodes from substantial damage due to arcing and chemical attack. The electrode walls of a MHD generator duct have periodic conductor/insulator elements where channel divergence or convergence is accomplished in a stepwise fashion. The electrode is situated within the insulator of each element to be backward-facing so as not to be directly exposed to the hot gas flow. The turbulence which exists at the backward-facing electrode moves the arc spot about the surface to prevent severe local damage. Chemical attack inhibited by a laminated electrode surface of a low corrosive material and the turbulence which aids in cooling the electrode face. Additional cooling may be obtained by a purge jet at the electrode face.

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Document Details

Document Type
Technical Report
Publication Date
Nov 05, 1979
Accession Number
ADD006947

Entities

People

  • Oscar Biblarz

Organizations

  • United States Department of the Navy

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Chemical Reactions
  • Chemical Stability
  • Dielectrics
  • Electrical Conductivity
  • Electricity
  • Electrodes
  • Flow
  • Gas Flow
  • Gases
  • Generators
  • High Temperature
  • Hot Gases
  • Inventions
  • Magnetic Fields
  • Schematic Diagrams
  • Stainless Steel

Readers

  • Computational Fluid Dynamics (CFD)
  • Plasma Physics.

Technology Areas

  • Microelectronics